Storm Scroll Spy

Automated scroll position related navigation state management.

Can be used in conjunction with https://stormid.github.io/storm-scroll-to for single page scrolling navigation.

Example

https://stormid.github.io/storm-scroll-spy

Usage

HTML

<nav class="js-scroll-spy">
    <a href="#section1">Section 1</a>
    <a href="#section2">Section 2</a>
    <a href="#section3">Section 3</a>
</nav>
<section id="section1">
    ...
</section>
<section id="section2">
    ...
</section>
<section id="section3">
    ...
</section>

JS

npm i -S storm-scroll-spy

either using es6 import

import ScrollSpy from 'storm-scroll-spy';

ScrollSpy.init('.js-scroll-spy');

asynchronous browser loading (use the .standalone version in the /dist folder)

import Load from 'storm-load';

Load('/content/js/async/storm-scroll-spy.standalone.js')
    .then(() => {
        StormScrollSpy.init('.js-scroll-spy');
    });

Options

{
    offset: 0,
    activeClassName: 'active',
    callback: null
}

e.g.

ScrollSpy.init('.js-scrollspy', {
	offset: 50%
});

Tests

npm run test

Browser support

This is module has both es6 and es5 distributions. The es6 version should be used in a workflow that transpiles.

This module depends upon Object.assign available in all evergreen browsers. ie9+ is supported with polyfills, ie8+ will work with even more polyfills for Array functions and eventListeners.

Dependencies

None external.

Imports raf-throttle.

License

MIT

Credits

Inspired by cferdinandi's gumshoe